4 Bible Verses about Overestimation

And because of God's unearned favor shown to me [i.e., in appointing me to be an apostle], I am telling every person among you not to think he is more important than he really is. Instead, he should have a sensible estimate [of his gifts] in harmony with the degree of faith God has given to each person.

For any person who thinks he is someone [important], when he is really nothing, is self-deceived.

Have the same [good] thoughts toward one another. Do not [always] be thinking you are a "bigshot," but lower yourself to accept humble tasks [or, humble people]. Do not think you are so smart.

However, if I wanted to boast, I would not be a fool, because I would be telling the truth. But I will hold back, so that no one will think more of me than what he sees or hears from me.